spring boot 2.0 Feign的客戶端

1.pom.xml

<dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>2.0.2.RELEASE</version>
        </dependency>

2.UserConsumerDemoApplication.java

@EnableFeignClients

3.UserClient.java

package cn.itcast.user.client;

import cn.itcast.user.pojo.User;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;

@FeignClient("user-service")
public interface UserClient {
    @GetMapping("{id}")
    User getUserQueryInfo(@PathVariable("id") Long id);
}

4.UserFController.java

package cn.itcast.user.controller;

import cn.itcast.user.client.UserClient;
import cn.itcast.user.pojo.User;
import com.netflix.hystrix.contrib.javanica.annotation.DefaultProperties;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixProperty;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;

@RestController
@RequestMapping("consumerF")
@DefaultProperties(defaultFallback = "queryUserByIdFallback")
public class UserFController {
    @Autowired
    private UserClient userClient;

    @GetMapping("{id}")
    public User queryUserById(@PathVariable("id") Long id){
        return userClient.getUserQueryInfo(id);
    }

    public String queryUserByIdFallback(){
        return "用戶信息查詢出現異常！";
    }
}